| Lac-Sergent | |
| Settlement Type: | City |
| Flag Size: | 100x80px |
| Motto: | Vivre en harmonie (Living in Harmony) |
| Pushpin Map: | Canada Central Quebec |
| Pushpin Label Position: | left |
| Pushpin Map Caption: | Location in central Quebec |
| Coordinates: | 46.85°N -115°W |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Type2: | Region |
| Subdivision Name2: | Capitale-Nationale |
| Subdivision Type3: | RCM |
| Subdivision Name3: | Portneuf |
| Established Title1: | Constituted |
| Established Date1: | February 25, 1921 |
| Government Footnotes: | [1] |
| Leader Title: | Mayor |
| Leader Name: | - |
| Leader Name2: | Portneuf |
| Area Total Km2: | 5.60 |
| Area Land Km2: | 3.72 |
| Population Footnotes: | [2] |
| Population Total: | 541 |
| Population As Of: | 2021 |
| Population Density Km2: | 145.3 |
| Population Blank1 Title: | Pop 2016-2021 |
| Population Blank1: | 8.9% |
| Population Blank2 Title: | Dwellings |
| Population Blank2: | 432 |
| Timezone: | EST |
| Utc Offset: | −5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | −4 |
| Area Code: | 418 and 581 |
| Blank Name: | Highways |
Lac-Sergent is a village situated alongshore Sergent Lake in Portneuf Regional County Municipality in the Canadian province of Quebec. It is about 50km (30miles) north-west of Quebec City.
In the 2021 Census of Population conducted by Statistics Canada, Lac-Sergent had a population of living in of its total private dwellings, a change of from its 2016 population of . With a land area of 3.72km2, it had a population density of in 2021.[3]
Population trend:[4]
Mother tongue: